Curve-fitting equation for prediction of the start-up stress overshoot of an oil-based drilling fluid

Andrade, Diogo E. V.; Fernandes, Rubens Rosario; Santos, Tainan Gabardo Miranda dos; Ceccon, Emanuel Vitor; Cruz, Ana C. B. da; Franco, A.; Negrão, Cezar Otaviano Ribeiro

doi:10.1016/j.petrol.2016.07.037

Cited by 16 publications

(1 citation statement)

References 29 publications

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“…The EAOS/OAOS ( α = 0.7) solution has the largest area of the hysteresis loop, reflecting it requires more energy to destroy the internal structure of the solution and the internal structure is more stable. Besides, the stress overshoot phenomenon, which is also described by the American Petroleum Institute as gel strengths (Speers et al, 1987), is observed during the flow start‐up (Andrade et al, 2016) in EAOS/OAOS wormlike micelle solutions. At the beginning of shearing, the stress reaches a maximum value, which corresponds to the breakdown of the thin lubrication layer formed by the gel on the wall (Divoux et al, 2011).…”

Section: Resultsmentioning

confidence: 88%

Rheological behavior of a novel fracturing fluid formed from amine oxide surfactants

Chen

Tan

Fang

et al. 2022

J Surfact & Detergents

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In this paper, two kinds of long-chain amine oxide surfactants, erucamidopropyl dimethylamine oxide (EAOS) and oleamidopropyl dimethylamine oxide (OAOS) were synthesized and compounded with different mass ratios. The rheological tests show that there is a synergistic effect between EAOS and OAOS, and this effect reaches the strongest at the EAOS/OAOS solution with α = 0.7 (α is the mass fraction of EAOS in the mixed surfactant). Through the synergistic effect between EAOS and OAOS, the temperature resistance of amine oxide surfactant solutions can be effectively improved. EAOS/OAOS (α = 0.7) solutions with total surfactant mass fractions of 3, 4, and 5 wt% show good high-temperature resistance at 130, 140, and 150 C, respectively. After shearing for 60 min at 100 s À1 , 160 C, the remaining viscosity of the 5 wt% EAOS/OAOS (α = 0.7) with 1 wt% KCl solution is 30 mPa s, meeting the demand of viscoelastic surfactant fracturing fluids.

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Section: Resultsmentioning

confidence: 88%